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Institute of Solid State Physics

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Solid state physics is the study of how atoms arrange themselves into solids and what properties these solids have. By examining the arrangement of the atoms and considering how electrons move among the atoms, it is possible to understand many macroscopic properties of materials such as their elasticity, electrical conductivity, or optical properties. The Institute of Solid State Physics focuses on organic, molecular, and nanostructured materials. Often detailed studies of the behavior of these materials at surfaces are made. Our research provides the foundation for important advances in technology such as energy efficient lighting, solar cells, electronic books, environmental sensors, and medical sensors.


Paper Strength


Doping molecular wires


Self-assembled monolayer transistors


Polymer laser

 

Solid State Seminar - Summer 2015
Wednesday 05 August 2015      

11:15 - 12:15

Thiolate versus Selenolate: Structure, Stability and Charge Transfer Properties
Piotr Cyganik

Abstract: Selenolate is considered as an alternative to thiolate to serve as a headgroup mediating the formation of self-assembled monolayers (SAMs) on coinage metal substrates. There are however ongoing vivid discussions regarding the advantages and disadvantages of these anchor groups, regarding, in particular, the energetics of the headgroup-substrate interface and their efficiency in terms of charge transport/transfer. In this presentation I will present an overview of experiments aiming in addressing all these issues by comparing structure, stability and finally also conductance for thiols and selenols based SAMs. Of particular importance were comparable packing densities and molecular orientations in the studied systems, which, in our opinion, are indispensable prerequisites for reliable comparison of these two types of SAMs regarding structural quality, bond strength and transport properties. In view of the above aspects, optimization of the headgroup seems to be a promising, but not obvious, way to tune the structural and electronic properties of SAM-like molecular films.